Download or read book Optimization of R Q Policies for Multi echelon Inventory Systems with Guaranteed Service written by Peng Li and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Approximate Policies in Multi echelon Inventory Systems written by Nesim K. Erkip and published by . This book was released on 1984 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Evaluation of Control Policies for Multi echelon Inventory Systems written by Wen-Fa Zhang and published by . This book was released on 1994 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strategic Inventory Placement in Large Scale Multi Echelon Networks written by Josef Svoboda and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The placement and sizing of safety stocks in supply chains pose a challenging optimization problem. State-of-the-art multi-echelon inventory optimization models, such as the guaranteed-service approach, are non-linear and depend on statistical, time-series-based approaches that require distributional and parametric assumptions. We propose a data-driven, non-parametric and distribution-free approach for safety stock planning in multi-echelon inventory networks that utilizes historical demand and feature data. We extend data-driven optimization in inventory control from newsvendor models to multi-period and multi-echelon problems. Our model accommodates general, acyclic multi-echelon networks and simultaneously determines safety stock allocation and sizing by setting cost-optimal base stocks for all stages under consideration of service requirements. By developing a mixed-integer programming formulation and a Benders decomposition method, we offer a novel methodological approach to a well-studied problem that can be solved with commercial mathematical programming solvers. We also provide a probabilistic analysis of the data-driven performance relative to an oracle solution when sample data is limited. We show that the mixed integer programming approach is scalable by solving 38 large-scale supply chain benchmark networks with assembly, distribution, and general structures.

Download or read book Continuous review Policies for a Multi echelon Inventory Problem with Stochastic Demand written by Marc De Bodt and published by . This book was released on 1982 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi echelon Inventory Optimization for an Oil Services Company written by Michael Chalapong and published by . This book was released on 2011 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the oilfield services industry, healthy margins and the criticality of product availability have often over shadowed the need for operational efficiency. Although those factors have not changed, the emergence of stronger industry competition and challenging economic climates have prompted ABC company to explore efficiency gains via supply chain optimization. This thesis examines and assesses opportunities for ABC Company to employ statistical inventory models, understand a variety of factors that influence inventory levels and costs, and improve its network structure. As many inventory models are not designed to accommodate SKUs that have very low rates of consumption, we also propose a methodology that will provide operational guidance and cost implications to address these types of SKUs.

Download or read book A Systems Approach to Optimize a Multi echelon Repairable Item Inventory System with Multiple Classes of Service written by Paul Lee Ewing and published by . This book was released on 2002 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation and Optimization of One for one Replenishment Policies for Multiechelon Inventory Systems written by Antony Svoronos and published by . This book was released on 1986 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inventory Optimization in Large Scale Multi echelon Spare Parts Inventory Systems written by Mohammad Hani Al-Rifai and published by . This book was released on 2005 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Continuous Review Policies for a Multi Echelon Inventory Problem with Stochastic Demand written by Marc De Bodt and published by Palala Press. This book was released on 2015-09-05 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Optimizer written by M. Cohen and published by . This book was released on 1989 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A New Perspective on Multi echelon Inventory Systems written by Alp Muharremogl̆u and published by . This book was released on 2002 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: (cont.) In addition to providing a simple proof technique, the new approach gives rise to efficient algorithms for the calculation of the policy parameters, for all the systems described above. Finally we analyze an assembly system with stochastic leadtimes. We show that the problem can be decomposed into a series of subproblems, each with a single kit of parts. This enhances our understanding about optimal policies in this setting and we develop a relatively efficient algorithm for the computation of optimal policies.

Download or read book Multi Echelon Inventory Impact of Varied Ordering Policies on Realized Service Levels written by Stephen P. Brady and published by . This book was released on 1999-08-01 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wholesalers face an environment where different retail establishments may follow different ordering policies. Typically, wholesalers do not consider the individual retail establishment's ordering policies when setting and computing their service levels. This research looked at whether there was a negative impact on retailers due to interactions between ordering policies. Current research has focused on serial relationships in multi-echelon inventory problems. This research extends existing research by assessing the impacts of differing ordering policies upon service level performance for each retail level establishment in a parallel multi-echelon inventory environment, for slow-demand items. Conducted through the use of simulation, one model was developed representing three ordering policies: Periodic Review, Continuous Review, and an Instantaneous Reorder Policy. Each policy was isolated, and the models run to get a baseline of performance. Finally, the complete model was run, and comparisons were made between the performance of the policies alone, and interacting.

Download or read book Optimizer IBM s Multi echelon Inventory System for Managing Service Logistics written by International Business Machines Corporation. Research Division and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simulation of Macro Multi echelon Inventory Policies written by Sheldon E. Haber and published by . This book was released on 1970 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alternative repair part inventory policies are examined for a multi-echelon logistics system. The policies assessed pertain to the design of multi-echelon systems rather than the evaluation of stock level decisions for individual repair parts. Although the context is one of a military inventory system, the policies examined are of importance in non-military systems where item failure rates are low and only periodic access to resupply is possible. (Author).

Download or read book Modified Echelon r Q Policies with Guaranteed Performance Bounds for Stochastic Serial Inventory Systems written by Ming Hu and published by . This book was released on 2014 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: We consider the classic continuous-review N-stage serial inventory system with a homogeneous Poisson demand arrival process at the most downstream stage (Stage 1). Any shipment to each stage, regardless of its size, incurs a positive fixed setup cost and takes a positive constant leadtime. The optimal policy for this system under the long-run average cost criterion is unknown. Finding a good worst-case performance guarantee for this problem remains an open problem. We tackle this problem by introducing a class of modified echelon (r, Q) policies that do not require Q_{i 1}/Q_i to be a positive integer: Stage i 1 ships to Stage i based on its observation of the echelon inventory position at Stage i; if it is at or below r_i and Stage i 1 has positive on-hand inventory, then a shipment is sent to Stage i to raise its echelon inventory position to r_i Q_i as close as possible. We construct a heuristic policy within this class of policies, which has the following features: First, it has provably primitive-dependent performance bounds. In a two-stage system, the performance of the heuristic policy is guaranteed to be within (1 K_1/K_2) times of the optimal cost, where K_1 is the downstream fixed cost and K_2 is the upstream fixed cost. We also provide an alternative performance bound, which depends on efficiently-computable optimal (r, Q) solutions to N single-stage systems, but tends to be tighter. Second, the heuristic is simple, efficiently computable and numerically performs well, likely to even outperform the optimal integer-ratio echelon (r,Q) policies when K_1 is dominated by K_2. Third, the heuristic is asymptotically optimal, as we take some dominant relationships, between the setup or holding cost primitives at an upstream stage and its immediate downstream stage, to the extreme, e.g., when h_2/h_1 rightarrow0, where h_1 is the downstream holding cost parameter and h_2 is the upstream holding cost parameter.

Download or read book Optimization of Multi echelon Inventory Development in a Finished Goods Network written by Po-Hsin Liu and published by . This book was released on 1999 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: